PRS Guitars’ USB-Rechargeable Clip-On Tuner is easy to use, stunningly accurate and wholly reliable. A single charge on this tuner will last weeks, and, with the provided USB cable, recharging is simple without the need for batteries. The no-slip clip anchors a 360° rotating arm for guaranteed readability. And, best of all, the PRS Rechargeable Clip-On Tuner proudly stands with the most accurate tuners in the market with .5 cent accuracy in strobe mode.